1. The Problem of Induced Abortion in Chile
2. Indications for Termination of Pregnancy: Report by B.M.A. Committee on Therapeutic Abortion
3. Center for Disease Control (1979). Abortion Surveillance, 1977. US Dept. Health, Education and Welfare.
4. ‘Unwanted Pregnancy and Counselling’;Cheetham,1977
5. Conn F.G. (Ed.) (1975). Population Reports No. 8. George Washington University, USA.